package com.xiaoxing.upload,

  。

import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Iterator; import java.util.List; import java.util.UUID,

import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse,

import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload,

/**  * <h1>Apache Fileupload文件上传（2014-5-3）</h1>  * <p>1、如果你对本示例感兴趣并想了解更多，欢迎加入Java私塾在线学习社区（329232140）</p>  * <p>2、针对这个例子小修小改便可移植到你的实际项目中。</p>  */ public class FileUploadServlet extends HttpServlet {     private static final long serialVersionUID = 7579265950932321867L;     // 设置文件默认上传目录（如果你没有在web.xml中配置的话）     private String uploadDir = "c:/"; // 文件上传目录     private String tempUploadDir = "c:/"; // 文件临时存放目录（会话销毁后由监听器自动删除）     /*      * (non-Javadoc)      * @see javax.servlet.GenericServlet#init()      * 如果在web.xml中配置了文件上传目录则优先使用，判断文件目录是否存在，不存在就创建。      */     @Override     public void init() throws ServletException {         // 获取本项目所在真实硬盘目录         String path = getClass().getProtectionDomain().getCodeSource().getLocation().getPath();         path = path.substring(0, path.indexOf("WEB-INF"));         // 判断目标是否存在，不存在就建立         String uploadDir = path.concat(this.getInitParameter("uploadDir"));         String tempUploadDir = path.concat(this.getInitParameter("tempUploadDir"));         File f_uploadDir = new File(uploadDir);         File f_tempUploadDir = new File(tempUploadDir);         if (!f_uploadDir.exists()) {             f_uploadDir.mkdirs();         }         if (!f_tempUploadDir.exists()) {             f_tempUploadDir.mkdirs();         }         // 给变量赋值         this.uploadDir = uploadDir;         this.tempUploadDir = tempUploadDir;     }     /*      * (non-Javadoc)      * @see javax.servlet.http.HttpServlet#doGet(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)       * 不接收get方式提交的数据，返回上传失败状态码。      */     @Override     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {         this.setResponse(response);         PrintWriter out = response.getWriter();         out.print("{\"error\":\"-1\""); // 非法提交方式     }     /*      * (non-Javadoc)      * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)      * 上传文件请求都是通常POST提交      */     @Override     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {         this.setResponse(response); // 设置响应类型，以便前端解析         PrintWriter out = response.getWriter();         String result = "";         try {             // 检查本次是否一个文件上传请求             boolean isMultipart = ServletFileUpload.isMultipartContent(request);             if (isMultipart) {                 DiskFileItemFactory factory = new DiskFileItemFactory(); // 创建一个工厂基于磁盘的文件项                 factory.setRepository(new File(tempUploadDir)); // 配置储存库（确保安全的临时位置时）                 ServletFileUpload upload = new ServletFileUpload(factory); // 创建一个新的文件上传处理程序                 upload.setSizeMax(1024 * 1024 * 100); // 设置总体要求尺寸限制（建议前后台分别设置，因为前后台用到了不同的插件）                 List<FileItem> items = upload.parseRequest(request); // 解析请求                 Iterator<FileItem> iter = items.iterator(); // 处理上传的项目                 while (iter.hasNext()) { //如果是一次性上传多个文件，那这里会分别去保存                     FileItem item = iter.next();                     if (!item.isFormField()) { // 过滤表单里的非文件类型字段                         if (!"".equals(item.getName())) { // 过滤非文件类型的input                             String s_name = item.getName(); // 获得原始文件名                             int position = s_name.lastIndexOf(".");                             String s_fileType = s_name.substring(position, s_name.length()); // 获得文件后缀                             String date = new SimpleDateFormat("yyyyMMdd").format(new Date());                             String s = uploadDir.concat("/").concat(date).concat("/");                             //这里按日期分目录保存文件                             File sf = new File(s);                             if (!sf.exists()) {                                 sf.mkdirs();                             }                             String s_filePath = s.concat(UUID.randomUUID().toString()).concat(s_fileType);                             File path = new File(s_filePath);                             item.write(path);                             result += s_filePath.concat(",");                         } else {                             result = "";                             break;                         }                     }                 }             } else {                 result = "";             }             String s_resultJSON = this.jointJSON(result); // 拼接返回前端JSON             out.print(s_resultJSON);         } catch (Exception e) {             e.printStackTrace();         } finally {             out.flush();             out.close();         }     }     /**      * 拼接JSON，将保存文件的文件名和日期目录返回给前端（前端可能需要这个路径完成其他表单操作，比如将文件路径存放到数据库）      * @param result JSON格式的字符串      * @return      * @throws UnsupportedEncodingException      */     private String jointJSON (String result) throws UnsupportedEncodingException {         String str = "";         if(!"".equals(result)) {             String rs[] = result.split(",");             StringBuffer buffer = new StringBuffer("{\"rows\":[");             for (int i = 0; i < rs.length; i++) {                 String s_tmpName = rs[i];                 s_tmpName = s_tmpName.substring(uploadDir.length(), s_tmpName.length());                 buffer.append("{\"name\":\"").append(s_tmpName).append("\"},");             }             str = buffer.toString();             str = str.substring(0, str.length() - 1).concat("]}");         } else {             str = "{\"error\":\"-2\""; //上传失败         }         return str;     }     /**      * 设置响应类型ContentType为"application/x-json"      * @param response      */     private void setResponse(HttpServletResponse response) {         response.setCharacterEncoding("UTF-8");         response.setContentType("application/json;charset=UTF-8");         response.setHeader("cache-control", "no-cache");     } 。

} 。

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>jQuery Uploadify + Apache Fileupload异步上传文件示例(2014-5-3)</title>
<link rel="stylesheet" type="text/css" href="/js/uploadify/uploadify.css">
<script src="/js/ jquery-1.9.0.js"></script>
<script src="/js/uploadify/jquery.uploadify.min.js"></script>
<script type="text/javascript">
$(function() {
 $('#fileupload').uploadify({
     'method'   : 'post',
     'buttonText' : 'flash上传文件',
     'fileSizeLimit' : '1024KB',
     'fileTypeExts' : '*.gif; *.jpg; *.png',
  'swf'      : '/js/uploadify/uploadify.swf',
  'uploader' : '/upload', //这是上传 图片的路径，也就是我在web.xml里配置的servlet
  'onUploadSuccess' : function(file, data, response) { //图片上传成功后返回数据在这里处理
      var ary = eval("(" + data + ")").rows;
      for(var i = 0; i < ary.length; i++) {
          $("#J_div").append("<img style="margin: 3px auto 0px; padding: 0px 3px; outline: none; line-height: 25.2px; font-size: 14px; background: rgb(242, 246, 251); width: 640px; clear: both; border-top: 1px solid rgb(0, 153, 204); border-right: 1px solid rgb(0, 153, 204); border-left: 1px solid rgb(0, 153, 204); border-image: initial; border-bottom: none; font-family: tahoma, arial, "Microsoft YaHei";"> 复制代码代码如下:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" metadata-complete="true" version="3.0">
  <welcome-file-list>
   <welcome-file>test_upload.html</welcome-file>
  </welcome-file-list>

  <servlet>
    <description>专门用来处理上传操作的servlet</description>
        <servlet-name>FileUploadServlet</servlet-name>
        <servlet-class>com.xiaoxing.upload.FileUploadServlet</servlet-class>
        <init-param>
         <description>文件存放的正式目录，可以自己配置</description>
         <param-name>uploadDir</param-name>
         <param-value>/upload/images/</param-value>
        </init-param>
        <init-param>
         <description>文件存放的临时目录，可以自己配置，里的文件由下面配置的监听器自动删除。</description>
         <param-name>tempUploadDir</param-name>
         <param-value>/upload/temp</param-value>
        </init-param>
    </servlet>
    <servlet-mapping>
        <servlet-name>FileUploadServlet</servlet-name>
        <url-pattern>/upload</url-pattern>
    </servlet-mapping>

    <listener>
     <description>临时文件资源清理，工具包自带，不用我们来写</description>
     <listener-class>org.apache.commons.fileupload.servlet.FileCleanerCleanup</listener-class>
   </listener>

</web-app>